Can't delete meeting on shared resource's calendar

A staff manager has shared access to a resources's calendar, with manager rights. She's created several meetings on that calendar, by choosing that resources calendar instead of her own from the calendar drop down menu. Now she needs to edit one of them - but she doesn't have any option to do that when she right clicks on the meeting. She can't delete either. Is there a fix or workaround for this problem (other than having an admin delete through the admin console with "View Mail")?

Since I'm not permitted to create a resource calendar to help troubleshoot this situation, can you check to see if either the original admin or this user can open the resource directly from the Zimbra Web Console and remove the entree?

My bases for this questions comes from a similar process that is completed on an Exchange service where resource calendar entrees can be removed when logging directly into the resource it self.

Since I'm not permitted to create a resource calendar to help troubleshoot this situation, can you check to see if either the original admin or this user can open the resource directly from the Zimbra Web Console and remove the entree?

My bases for this questions comes from a similar process that is completed on an Exchange service where resource calendar entrees can be removed when logging directly into the resource it self.

Hope this helps.

She's only using the web interface for Zimbra, so the Exchange protocol's not involved - I did see reports of a similar problem when accessing a resource through Exchange. She was the first user set up to admin this resource, so I guess that makes her the original admin? Thanks for your help